84 lines
2.5 KiB
Python
84 lines
2.5 KiB
Python
import gtk
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import goocanvas
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import cairo
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from sugar.canvas.IconItem import IconItem
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class Grid:
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COLS = 80.0
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ROWS = 60.0
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MACRO_CELL_FACTOR = 5.0
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def get_macro_rows(self):
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return Grid.ROWS / Grid.MACRO_CELL_FACTOR
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def get_macro_cols(self):
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return Grid.COLS / Grid.MACRO_CELL_FACTOR
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def macro_to_micro(self, x, y):
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return [round(x * Grid.MACRO_CELL_FACTOR),
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round(y * Grid.MACRO_CELL_FACTOR)]
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def micro_to_macro(self, x, y):
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return [round(x / Grid.MACRO_CELL_FACTOR),
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round(y / Grid.MACRO_CELL_FACTOR)]
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def convert_from_screen(self, x, y):
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factor = Grid.COLS / gtk.gdk.screen_width()
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grid_x = round(x * factor)
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grid_y = round(y * factor)
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return [grid_x, grid_y]
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def convert_to_canvas(self, grid_x, grid_y):
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scale = 1200 / Grid.COLS
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return [grid_x * scale, grid_y * scale]
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def set_constraints(self, component, x, y, width=-1, height=-1):
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if isinstance(component, gtk.Window):
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self._layout_window(component, x, y, width, height)
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elif isinstance(component, goocanvas.Item):
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self._layout_item(component, x, y, width, height)
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elif isinstance(component, goocanvas.CanvasView):
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self._layout_canvas(component, x, y, width, height)
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def _layout_window(self, window, x, y, width, height):
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scale = gtk.gdk.screen_width() / Grid.COLS
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window.move(int(x * scale), int(y * scale))
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window.resize(int(width * scale), int(height * scale))
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def _layout_item(self, item, x, y, width, height):
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scale = 1200 / Grid.COLS
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self._allocate_item_position(item, x * scale, y * scale)
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if width > 0 and height > 0:
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self._allocate_item_size(item, width * scale, height * scale)
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# FIXME We really need layout support in goocanvas
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def _allocate_item_size(self, item, width, height):
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if isinstance(item, goocanvas.Rect):
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item.props.width = width - (item.props.line_width - 1) * 2
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item.props.height = height - (item.props.line_width - 1) * 2
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elif isinstance(item, goocanvas.Text):
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item.props.width = width
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elif isinstance(item, goocanvas.Image):
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item.props.width = width
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item.props.height = height
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elif isinstance(item, IconItem):
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item.props.size = width
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def _allocate_item_position(self, item, x, y):
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if isinstance(item, goocanvas.Rect):
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x = x + (item.props.line_width - 1)
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y = y + (item.props.line_width - 1)
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matrix = cairo.Matrix(1, 0, 0, 1, 0, 0)
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matrix.translate(x, y)
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item.set_transform(matrix)
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def _layout_canvas(self, canvas, x, y, width, height):
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scale = 1200 / Grid.COLS
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canvas.set_bounds(x * scale, y * scale, width * scale, height * scale)
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